Try Google Chrome OS on Windows XP

Google Chrome OS is a new operating system by Google, which is mainly targeted towards netbooks. According to the blog post on the Official Google Blog:

Speed, simplicity and security are the key aspects of Google Chrome OS. We’re designing the OS to be fast and lightweight, to start up and get you onto the web in a few seconds. The user interface is minimal to stay out of your way, and most of the user experience takes place on the web. And as we did for the Google Chrome browser, we are going back to the basics and completely redesigning the underlying security architecture of the OS so that users don’t have to deal with viruses, malware and security updates. It should just work.

You can try Chrome OS even if it is for netbooks. The official version is not out yet but the guys at gdgt.com have a version of Google Chrome OS that you can download and test. You need to register on their site and verify your email address to be able to download the OS.